High chromium nitrogen bearing castable alloy
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United States of America Patent
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Jul 13, 2004
Grant Date -
N/A
app pub date -
Jan 9, 2002
filing date -
Jan 9, 2002
priority date (Note) -
Expired
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Abstract
The present invention is directed to a corrosion and erosion resistant High Chromium, Nitrogen bearing alloy, comprising the following composition in wt. %: 28-48 chromium, 0.01-0.7 nitrogen, 0.5-30 manganese, 0.01-5 boron, 0.3-2.5 carbon, up to 0.01-25 cobalt plus nickel, up to 0.01-5 silicon, up to 0.01-8 copper, up to 0.01-6 molybdenum, up to 2% of each one selected from group consisting of zirconium, vanadium, cerium, titanium, tungsten, niobium, aluminum, calcium, and rare earth elements with the balance being essentially iron and other trace elements or inevitable impurities. The alloy has a microstructure comprising hypoeutectic, eutectic, chromium carbides, boride and nitrides in the austenitic matrix, saturated with nitrogen with virtually no secondary carbides and nitrides.
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